In this paper, TZMbased composites with different TiC contents (1%, 5%, 10%, 15%) were prepared by highenergy ball milling and spark plasma sintering. The microstructure evolution of TZMTiC composites was discussed and analyzed in detail. In addition, the mechanical properties of TZMTiC composites were evaluated from various aspects, and ...
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In this paper, Mg2Ni hydrogen storage alloy powder was prepared by highenergy ball milling mechanical alloying method, and the influence of stirring shaft rotation speed, ball milling time, and ...
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We prepared various nanocrystalline ceramics by highenergy ball milling. The investigated systems are the oxide ceramics Li 2 O, LiNbO 3, LiBO 2, B 2 O 3, TiO 2 as monophase materials and the composite material Li 2 O : B 2 O 3. The average grain size was adjusted by variation of the milling time. It was determined via line broadening of Xray ...
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Multiple catalysts have exhibited high activity on improving the hydrogen storage performance of magnesium hydride. Herein, TiFe as a superior catalyst was successfully prepared, and then doped into MgH 2 via ball milling to improve the de/rehydrogenation properties of MgH 2 at low temperatures. Compared with asprepared MgH 2, the onset desorption temperature could be reduced to 175 °C after ...
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We have obtained a highentropy carbide phase by twostep highenergy ball milling (HEBM) of metallic precursors and carbon. At the first stage of HEBM, a powder of highentropy alloy TiTaNbZrHf was prepared. 15 min of HEBM were found to be adequate to converse the initial metallic precursors into a bcc solid solution. Highentropy carbide was ...
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In this chapter, we will present and discuss the approaches taken place in the world to improve the kinetics behavior of MgH 2, using highenergy ball milling method. The figure shows (a) BFI image and corresponding (b) BFI image of nanocomposite MgH 2 /5Ni/5Nb 2 O 5 powders obtained after 50 h of mechanical ball milling. The corresponding BF ...
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Due to its high efficiency and convenience, high energy mechanical ball milling has been used to synthesize nanostructured cathode and anode materials for lithiumion batteries (LIBs) and NIBs 11 ...
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Highenergy ball milling experiments were carried out in a Fritsch Pulverisette5 planetary ball mill with WC as the milling media. A ball to powder weight ratio of 10:1 was used with toluene as a process control agent at a milling speed of 300 rpm. The compositions studied were Cu5, 10, 15, 20, 25 and 30 wt.% Ta. Samples taken out of the ...
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In this study, CNT/Al5Mg composites were prepared by ball milling, hotpressing and hotdeformation method. CNT distribution and strengthening mechanism were analyzed. ... Processing of advanced materials using highenergy mechanical milling. Prog Mater Sci, 49 (2004), pp. 537560. View PDF View article View in Scopus Google Scholar [16]
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The starting powders were mixed by highenergy ballmilling for 2 h in dry condition using a shaker mill (Spex D8000, Spex CertiPrep, Metuchen, NJ) with WC balls and jars. The balltopowder ratio by weight was 10. Milling program was composed of two cycles of 1 h milling 1 h cooling schedule. In order to suppress the formation of oxides ...
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The high energy milling was performed at 1000 rpm for 2 h. The asmilled powders were highly agglomerated with a low SSA (<4 m 2 /g). A second milling step with lower energy and different milling times was performed in order to increase the specific surface area. A laboratory attritor containing mm hardened steel balls was used in this step.
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For all nanocrystalline materials prepared by highenergy ball milling synthesis route, surface and interface contamination is a major concern. In particular, mechanical attributed contamination by the milling tools (Fe or WC) as well as ambient gas (trace impurities such as O 2, N 2 in rare gases) can be problems for highenergy ball milling ...
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The highenergy milling allows the formation of agglomerates ( to 800 ... This study gives a detailed description of the formation of Mo/Si MAagglomerates prepared using a highenergy planetary ballmill. It has been demonstrated that mechanical activation results in the formation of micrometric agglomerates composed of the nanostructured ...
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Abstract. The microstructure of WC10%Co nanocomposite prepared by high energy ball milling was investigated by Xray diffraction and transmission electron microscopy. The WC phase was refined to a grain size of 11 nm after milling. The dislocation density in WC was high and caused severe lattice distortion. Dislocations with Burgers vector 1 ...
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Based on Fig. 6c, d and Table 5, after ballmilling, an obvious particle size decrement can be seen in M5 and M20 samples due to highenergy ballmilling. This energy is responsible for crystallite size reduction and lattice strain enhancement which can be measured from XRD patterns and WilliamsonHall equation (Table 5). Also, Fig. 6c, d ...
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TiO 2 nanopowders and Cudoped TiO 2 were prepared by highenergy ball milling and characterized by Xray diffraction (XRD), UVvis diffuse reflectance (UVvis DRS) spectra, a scanning electron microscope (SEM), an energy dispersive spectrum (EDS) and an Xray photoelectron spectrometer (XPS) to study the effect of Cu doping amount, milling time and ballstopowder ratio on the ...
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In this work, we synthesized zinc sulfide (ZnS) nanoparticles by the mechanochemical route using zinc acetate and sodium sulfide as source materials in a high energy planetary ball mill at rotation speed of 300 rpm with ball to powder ratio 5:1 for 30120 min. Powder samples were collected at duration of 30 min for different milled powders were washed with methanol to remove ...
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In the ceramic process, high energy ball milling was widely used to improve the reaction activity and optimize the structure, morphology and magnetic properties of Strontium hexaferrite. 1316 However, there is no report focusing on the morphology control of hexaferrite by ball milling, which is a direct evidence of the enhanced reaction ...
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Hydrogen storage nanocomposites prepared by high energy reactive ball milling of magnesium and vanadium alloys in hydrogen (HRBM) are characterised by exceptionally fast hydrogenation rates and a significantly decreased hydride decomposition temperature. Replacement of vanadium in these materials with vanadiumrich Ferrovanadium (FeV, V80Fe20 ...
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During the first process step, the powders are mixed by ball milling. Different highenergy milling configurations are found in the literature: planetary milling, attritor milling, shaker milling, and highkinetic rotor milling [5,6]. Table 1 gives an overview of the ball milling conditions in the cemented carbides field.
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Morphological, structural, and microstructural properties of nanocrystalline Fe50Co40Ni10 alloy prepared by highenergy planetary ball milling were studied by scanning electron microscopy and X ...
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The highenergy ball milling (mechanical activation) technology is a very simple and costeffective way to enhance the reactivity, promote crystal growth and reduce the sintering temperature [ 26, 27, 28, 29 ].
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The Ni50Ti50 and Ti50Ni25Cu25 alloys were produced in the form of powder using the highenergy ball milling. In the asmilled state, both alloys revealed presence of an amorphous state with a small amount of nanocrystalline areas. The nonisothermal DSC heating curves were used to investigate the crystallization process. Temperatures and activation energy of crystallization were determined. In ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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